Screw-head shaping and slotting device.



G. T. WARWICK. SCREW HEAD SHAPING ,AND SLOTTING DEVICE. APPLICATIONFILED JAN. Z2, 1909.

976,758. Patented Nov.22, 1910.

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GEORGE T. WARWICK, OF SPRINGFIELD, MASSACHUSETTS.

SCREW-HEAD SHAPING AND SLOTTING DEVICE.

Application led January 22, 1909.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, GEORGE T. VVARwIoK, a citizen of the United Statesof America, and resident of Springlield, in the county of Hampden andState of Massachusetts, have invented certain new and useful lmprove-CTI ments in Screw-Head Shaping and Slotting Devices, of which thefollowing is a full, clear, and exact description.

rlhis invention relates to mechanism for shaping the heads of screws orbolts, and it has for one of its objects the provision of a devicewhereby such heads are swaged to form them of uniform size and toprovide in each blank a slot adapted to receive a screw driver orsimilar implement.

My invention has, furthermore, for its object the combination with ahead-sizing device of a slotting blade carried thereby and adapted toenter the stock of the head to form the slot. Y

Further objects of the invention will hereinafter appear and the meansfor their at tainment particularly pointed out in the claims.

To attain the desired objects, my invention, broadly stated, consists ofa stationary part or member' carrying the screw and a movable memberadapted to completely receive and inclose the head of the screw, andwhen in such inclosed position to form the slot in said head of thescrew without spreading the material forming the head of the screw.

The invention further consists of means for completing the head of thescrew and forming the slot therein consisting of means for inclosing thehead and simultaneously forming the slot therein, and in the novelconstruction and combination of parts substantially as disclosed herein.

My invention has been clearly illustrated in the accompanying drawingsin which similar characters denote similar part-s, and in which- Figure1 represents a central longitudinal section through the cooperativeparts of the device preparatory to their operation upon a screw. Fig. 2is a similar View illustrating the action of the device in shaping andslotting the head of said screw. Fig. 3 is a side view of the slottingtool-holder partly broken away to disclose the slottin blade and themanner of securing the same 1n place therein. Fig. 4 is a perspectiveView of the blade-holder proper and Fig. 5 is a tive view of theslotting blade.

ln the drawings, 10 denotes a stationary head constituting a portion ofa machine which may be of any desired construction, which head isprovided with an aperture 11 to receive a work support 12 which may bereplaced by another one of different size and which is bored out toreceive the work or blank to be operated upon. The device is in thepresent instance adapted to shape and slot the heads of what aregenerally known as fillister head screws, and the holder 12 is providedat its forward end with a cylindrical hub 13 of such size as tocorrespond with the diameter of the head of the screw to be operatedupon. An abutment plunger 14 may be employed to rest against the end ofthe screw or blank so as to offer a resistperspec- `ance at that point.

The tool-holder containing-the slotting blade is preferably movable andcomprises a sleeve 15 which is screw threaded at its forward end as at16 to receive a cap 17 which is preferably tapered at its inner surface18 to correspond with the taper of a sizing-head 19 resting with itsrear face against the front face of the sleeve 15 above mentioned.

By referring to Fig. 4, it will be seen that the sizing-head is providedwith a longitudinal opening 20 of such size as to fit the head of thescrew to be operated upon and also the diameter of the hub 13 abovereferred to; while a plunger 21 is mounted for longitudinal movement inboth the sizing-head and the sleeve 15, the plunger 21 being providedwith a head 22 to receive one end of a stili" spring 23, the other endof which rests against a plate 24 so as to provide for yielding movementon part of the plunger or as it may be called formingtool 21.

The forward end of the forming-tool 21 is slightly dished, as shown in25, to correspond with the crown head of the screw blank, and saidplunger is slotted as at 26 to straddle the slotting blade 27, theopposite ends of which rest in side slots 28 of the sizing-head 19.

From the above description it will be noted that the cap 17 serves todraw the several pieces, viz, the sizing-head 19, blade 27, and thesleeve 15 tightly together.

When the movable tool-holder in its enin contactwith the front edge otthe blade 27, whereupon by the continued movement of said tool-holder,said blade will be forcedV into said head to form a slot, the metal dis#placed thereby naturally tending to eitherA elongate the headproportionately or to solidify and condense the head proportionatelywithout, however, changing the crown top face which will be maintainedby virtue of the crown recess 25, above mentioned.

As the tool-holder is now withdrawn from the work-holder, and as thehead 71, will now naturally lill the central bore 20, the frictionalcontactfbetween the screw head and the sizing-head will tend to Withdrawthe screw from its holder 12. However, this action is prevented by thespring 23 which is suiiicientlystrong to move the plunger 21 outwardduring the retrograde movement of the tool-holder so that the plunger 21will `then act as an ejector to relieve the sizinghead from the screwblank.

I claimz. Y

1. The combination, with a work-holder, 'of a tool-holder, one of saidparts being movable relatively to the other, said toolholder comprisinga sizing-head adapted to engage and conline the work to be operatedupon, a tool tix-ed in said tool-holder and adapted to enter upon thework in the toolholder, and an ejector plunger for releasing the workfrom the holder.

2. The combination, with a work-holder, of a tool-holder, one of saidparts being movable relatively to the other, said toolholder comprisinga sizing-head adapted to engage and confine the work to be operatedupon, a tool fixed in said tool-holder and adapted to enter upon thework inthe toolholder, an ejector lplunger for releasing the work fromthe holder, and yielding means for actuating said plunger.

3. The combination, with a work-holder, of a tool-holder, one ot saidparts being movable relatively to the other, said tool-holder comprisinga sizing-head adapted to engage and coniine the work to be operatedupon, a tool iXed in said tool-holder and adapted to enter upon the workin the tool-holder, an ejector plunger for releasing the work from theholder, means for guiding said plunger in the sizing-head, and a springfor actuating the same to release the work from the sizing-head.

4. The combination, with a work-holder, of a tool-holder, one of saidparts being movable relatively to the other, said tool-holder comprisinga sizing-head adapted to engage and conline the work to be operatedupon, a chambered sleeve having a centrally disposed aperture, anejector plunger yieldingly mounted in said sleeve and sizing-head, aslotting blade carried by said sizing-head, and means for securingv saidblade, sizinghead and sleeve together.

5. In screw head shaping and slotting devices, the combination of astationary member adapted to receive' and support a screw, of a movablemember having a head constructed to entirely `receive and completelyinclose the head of the screw, and means in the movable member forforming a slot in said head and finishing the head.

6. In screw head shaping and slotting devices, the combination of astationary inember adapted to receive the body of the screw and providedwith a support corresponding in size and shape to the head of -thescrew, and a movable member provided with means to snugly receive andinclose the screw head, and provided with a bladefor forming the slot inthe screw head.

7. In screw head shaping and slot-ting devices, the combination of astationary member constructed to receive the body of' the screw andsupport the head thereon, an abutment in said member for retaining thebody of the screw in proper relation, a movable member having a sizinghead shaped to receive and entirely surround and inclose the head of thescrew, a blade in the shaping head for forming the slot in the head ofthe screw and a yielding plunger in the sizing head for receiving theimpact of the head of the screw.

8. ln a screw head shaping and slotting device. the combination of apair of members adapted to have movements the one relatively to theother, and one of said members constructed with a screw shank socket andprovided with a -forwardly projecting cylindrical hub-like abutment withthe end of 'which the base of thescrew head engages,

and the other member having a sizing head provided with an endwiseopening cylindrical pocket for receiving therewithin and entirelyinclosing the head of the screw and into which said cylindrical abutmentmay follow, a transverse blade in the sizing head for forming a. slot inthe head of the screw and a yieldable plunger in the sizing head forreceiving the impact of the head of the screw.

Signed by me at Springfield, Mass., in presence of two subscribingwitnesses.

GEORGE T. WARWICK.

lVtnesses G. R. DRIscoLL, WM. F. BELLows.

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